Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Pentair (PNR) downgraded to Underperform from Market Perform at Cowen by analyst Joseph Giordano, who said the Valves & Controls sale will have a negative impact on future growth. The remaining company is more likely to see growth deceleration than acceleration, Giordano tells investors. 2. BankUnited (BKU) downgraded to Underperform from Market Perform at Hovde Group. 3. National Commerce (NCOM) downgraded to Market Perform from Outperform at Fig Partners. 4. Mobile TeleSystems (MBT) downgraded to Hold from Buy at HSBC. 5. Interactive Intelligence (ININ) downgraded to Neutral at Roth Capital and to Market Perform at Northland after the company announced yesterday that it has agreed to be acquired by Genesys for $60.50 per share in cash. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.